"My Drunken Irish Dad" is a song at the end of the Season 3 episode "Lenny's Lucky Day", sung by Lenny the Leprechaun and The Great Potato. The song was originally from the Family Guy episode "Peter's Two Dads".
Lenny: Hold it, hold it, hold it. First you guys belittle my favorite holiday and now you want to celebrate it?
Ricky: Yeah, so what?
Lenny: So what!? So let's dance!
Oh, he doesn't smell like Irish Spring,
And he never taught me anything,
But still I slap my chest and sing...
Of My Drunken Irish Dad.
Oh, his face looks like a railroad map,
And he never shuts his freakin' trap...
Great Potato: But all the ladies catch the clap
From your Drunken Irish Dad.
Lenny: Ask a Hennessey, Tennessey, Morrison, Shaughnessy, Riordan, and Rooney...
They'll tell you the same
McNulty, Mulrooney, and Cotter and Clooney
All feel the same mixture of pride and of shame.
Great Potato: Finnegan, Hannigan, Kelly, and Flanagan.
Look to the ground when their dad passes by
Cafferty, Rafferty, Joyce and O'Lafferty, fight for his honor and then start to cry!
Both: Oh, we Irish lads are all infirm,
And our moods infect us like a germ
'Cause we're all the spawn of a pickled sperm...
Great Potato: And we don't tan well either.
All: ...From a Drunken Irish Dad!!